Cone-Beam Computed Tomography and Radiographs in Dentistry: Aspects Related to Radiation Dose

Table 1

Tissue-weighting factors for calculation of effective radiation dose.

Tissue	ICRP 1990	ICRP 2005	ICRP 2007
Bone Marrow	0.12	0.12	0.12
Breast	0.05	0.12	0.12
Colon	0.12	0.12	0.12
Lung	0.12	0.12	0.12
Stomach	0.12	0.12	0.12
Gonads	0.20	0.05	0.08
Esophagus	0.05	0.05	0.04
Bladder	0.05	0.05	0.04
Liver	0.05	0.05	0.04
Thyroid	0.05	0.05	0.04
Bone surface	0.01	0.01	0.01
Brain	RT	0.01	0.01
Skin	0.01	0.01	0.01
Salivary glands	Not included	0.01	0.01
Kidney	RT	0.01	RT
Remainder Tissues	0.05^a	0.10^b	0.12^c

RT: Remainder tissues; ^aadrenals/brain/upper large intestine/small intestine/kidney/muscle/pancreas/spleen/thymus/uterus
^bAdipose tissue/adrenals/connective tissue/extrathoracic airways/gallbladder/heart wall/lymphatic nodes/muscle/pancreas/prostate/spleen/thymus/uterus/cervix
^cAdrenals/extrathoracic region/gallbladder/heart/prostate/kidneys/small intestine/lymphatic nodes/oral mucosa/muscle/pancreas/spleen/thymus/uterus/cervix (text in boldface represents tissues used for calculation of maxillofacial dose).